BRAINCAKETransition Metals
Revision notes for Transition Metals in Edexcel Chemistry (9CH0). Read the start of any lesson here, then sign in free for the whole lesson, the R.E.C.I.P.E. recall steps and the quiz.
- Transition MetalsA transition metal is a metal that can form one or more stable ions with an incomplete d orbital.
- Properties of Transition MetalsTransition elements have Relatively high densities compared to group 1 and group 2 metals High melting and boiling points.
- Complex IonsA complex ion is a metal ion surrounded by co-ordinately bonded ligands.
- Shapes of complex ionsThe shapes of complex ions depend on: Co-ordination number or number of co-ordinate bonds formed with the metal ion Size of ligand Complex ions with…
- IsomerismComplex ions exhibit geometric isomerism and optical isomerism.
- Formation of Coloured IonsTransition elements with incomplete d subshells have electrons that are initially in the ground state occupying lower energy levels.
- SpectroscopyWhen electromagnetic radiation reacts with matter the effect depends on the frequency of the radiation Infra red radiation causes bonds to vibrate…
- Ligand Substitution ReactionsIf concentrated HCl is added to a solution of hexaaquacopper (II) ions the solution turns from blue to yellow.
- VanadiumVanadium has four stable ions in solution which exist in oxidation states +2, +3, +4 and +5. +5 VO2+(aq) yellow +4 VO2+(aq) blue +3 V3+(aq) green +2…
- Tollens ReagentSilver is most commonly found in the +1 oxidation state and is easily reduced to silver metal.
- Redox PotentialThe redox potential of a transition metal is a measure of how easily it can be reduced to a lower oxidation state.
- Redox TitrationsRedox titrations can be used to determine the concentration of a reagent.
- Heterogeneous CatalystsA heterogeneous catalyst is one that is in a different phase from the reactants.
- Homogeneous CatalystsHomogeneous catalysts are in the same physical state as the reactants.
- AutocatalysisThis occurs when one of the products of a reaction is also a catalyst for the reaction.
- Hydration of Metal IonsTransition metal 2+ ions form octahedral hexaaqua II complexes with water.
- Reaction with Ammonia SolutionAmmonia can act as both a ligand and a base.
- Reaction with Sodium HydroxideDeprotonation is a reaction in which a base removes a proton from a species.
- Reaction with Sodium CarbonateTransition metals 2+ ions react with sodium carbonate to give insoluble carbonates.
- Test for Transition Metal IonsIf sodium hydroxide or ammonia solution is added to complex ion with water ligands insoluble hydroxides are precipitated.
- QuestionsA 25.0cm3 sample of a 0.1moldm-3 solution of V3+ ions was placed in a conical flask and excess dilute sulfuric acid added.